PHP implements the method of generating thumbnails in original proportions, generating thumbnails in php proportion_PHP tutorial

PHP implements the method of generating thumbnails in the original proportion, PHP generates thumbnails in proportion

This article describes the example of PHP in realizing the method of generating thumbnails in the original proportion. Share it with everyone for your reference, the details are as follows:

<&#63;php
$image = "jiequ.jpg"; // 原图
$imgstream = file_get_contents($image);
$im = imagecreatefromstring($imgstream);
$x = imagesx($im);//获取图片的宽
$y = imagesy($im);//获取图片的高
// 缩略后的大小
$xx = 140;
$yy = 200;
if($x>$y){
//图片宽大于高
  $sx = abs(($y-$x)/2);
  $sy = 0;
  $thumbw = $y;
  $thumbh = $y;
} else {
//图片高大于等于宽
  $sy = abs(($x-$y)/2.5);
  $sx = 0;
  $thumbw = $x;
  $thumbh = $x;
 }
if(function_exists("imagecreatetruecolor")) {
 $dim = imagecreatetruecolor($yy, $xx); // 创建目标图gd2
} else {
 $dim = imagecreate($yy, $xx); // 创建目标图gd1
}
imageCopyreSampled ($dim,$im,0,0,$sx,$sy,$yy,$xx,$thumbw,$thumbh);
header ("Content-type: image/jpeg");
imagejpeg ($dim, false, 100);
&#63;>

Readers who are interested in more PHP-related content can check out the special topics of this site: "Summary of PHP graphics and image operation skills", "Introduction to PHP basic syntax tutorial" and "Summary of common PHP functions and skills"

I hope this article will be helpful to everyone in PHP programming.

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http://www.bkjia.com/PHPjc/1098691.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1098691.htmlTechArticleHow to use PHP to generate thumbnails at the original ratio, generate thumbnails at the php ratio. This article describes how to use PHP to generate thumbnails at the original ratio. Thumbnail method. Share it with everyone for your reference, the details are as follows:...